Hypodermic syringe



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,w J. A. EBERLY. JR

HYPODERMI C SYRI NGE Filed May 24, 1921 IIVVENTOR Q A TTORNEY iidiiitcrited ay 1, was.

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HYJPUDEBMIC SYRINGIEI.

Application filed May 24,

To all "1.0 Item it may concern Be it known that ll, Jaooe A. Beauty, J12, a citizen of the United States, and residei'it of Philadelpltiia, county of Philadelphia, State of Pennsylvania, have invented an limprovement in l'lypoderniic Edyringes, of which the following is a specification.

li/[y inventionhas for its object the provision of a hypodermic syringe with a chuck havingmeans extendiiig beyond the nozzle oi the chuck through which the needle e):-

tends. whereby the extent of penetration of the needle is limited to something less than the whole length of that part of the needle which projects beyond the chuck proper by whichi it is held, said means being of such clniracter that, while limiting: the extent of. penetrationof the needle into the flesh, any bending; of the needle which n'iight cause its breakage is free to take place adjacent the end of the nozzle of the chuck, so that should the needle become brokeno'll during the operation, there will be a material portion of the needle projecting from the patientwhich may be grasped by a pair of pliers and positively withdrawn.

A further object oil? .my invention is to provide the guard or limiting means, which regulates the extent of the possible enetration of the needle, of such construction that it is detachable in respect to the noarnle ot the chuck, whereby it may be removably applied thereto, to enable the said guard device to be employed with existing; syringes.

With the above and other objects in view, the nature of which will be more fully understood from the description hereinatter,

the invention consists in the novel construction of hypodermic syringe, as hereinafter more fully described and defined in the claims. i

Referring to the drawings Fig, 1 is a side elevation of a hypodermic syringe embody ing my improvements and illustrating the same with theneedlc penetration shown as at a maximum depth; l?i q'. 2 is an enlarged view of the, end of the syringe with a chuck and guard applied thereto, the latter being in section; and Fig. isa perspective view of the guard and with the chuck and needle 1922].. {serial No. 472,053.

indicated in dotted lines, showing their re lation to the guard.

2 is the body of the syringe and may be of any suitable character. 3 illustrates the chuck which holds the needle 5, said chuck being screwed upon a threaded nipple on rected arms 8 forminga space 9 between them, said space opening into the tubular part of the sleeve and receiving the extreme end of the chuck. As is clearly indicated, the lateral arms 8 extend beyond the nozzle 4: of the chuck and on opposite sides of the needle 5, and at a considerable distance therefrom, so as not to interfere with the bending of the needle immediately adjacent to the end of the nozzle, should it occur, as will be understood by reference to Fig. 2, in which the arrow and dotted lines indicate the bending of the needle 5 into an oblique position and with a sharp bend adjacent to the nozzle 4t with liability of causing the needle to be broken thereat. The two prongs or arms 8 leave the space around the needle unobstructed, so that the needle may bend. sharply in all directions adjacent to the nozzle a, assuming, of course, that this objectionable and undesirable bending and breakage of the needle occurs by reason of the needle striking a bone or some obstruction during the penetration; and when the breakage under these conditions occurs, it is manifest that a sutiicient portion of the needle will. be extending beyond the surface 10 of the flesh to permit it to be grasped for ex traction. When this provision is not made and thei inozzle is pressed tightly upon the flesh, it :lrequently happens that the end of the broken needle is below the surface of the skin and must be probed for to insure extraction. Such undesirable practice is avoided by the use of my improvement, which absolutely insures the breakage, if it occurs, at a distance beyond the surface of the skin, determined by the extension of the prongs or arms 8 beyond the end of the nozzle 4. v

In my preferredconstruction, embodying the oppositely directed prongs or arms 8,

there will be no obstructing means excepting in one plane, and therefore, the syringe may be operated with the nozzle close to the skin during the penetration of the needle, whenever such is desirable or necessary. In a guard of the character shown, the needle is approximately as free beyond the end of the nozzle of the chuck as if the guard prongs 8 were not employed, and this is desirable and practically essential to insure the breakage, in case it occurs, adjacent the nozzle and wholly back of the ends, of the prongs or arms, it being the intent and purpose that said prongs or arms 8 shall contact with the skin in limiting the extent of perforation of the needle, but without objectionally affecting the needle itself. If the needle should bend laterally in a direction toward the prong OIaIm, it would be free to move past it should the syringe slip or forcibly change its movement with the needle from any cause. It is further to be understood that while the invention is preferably embodied by the use of two prongs or arms 8, nevertheless, the function of the invention may be accomplished by employing a single prong, ifso desired, and I, therefore, do not limit myself to the employment of a plurality of prongs. Furthermore, while my improved guard is removably adapted to existing nozzles orv chucks or caps of syringes by providing it with a tubular body or sleeveportion 7, nevertheless, the said device may be permanently soldered on to the chuck orcap or may be formed integral with it, as preferred. The essential feature of the invention resides inthe fact that the chuck or cap for holding the needle shall be provided with one or more prongs or guard extensions projecting beyond the junction of the needle and the chuck or cap and havingits ortheir free end portions located to one side of the needle and free therefrom, so as not to..hold or bind upon theneedle in any manner as to cause it to break by reason of contact therewith.

It will now be apparent that I have devised a novel and useful construction which embodies the features of advatage enumeratedas'desirable, and while I have in the present instance shown and described the preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, it is to be understood that I do not restrict myself to the details, as the same are susceptible of modification in various particulars without departing from the spirit or scope of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, i

1. In a device of the character stated, the combination of a chuck and hypodermic needle with a guard carried by and extending beyond the end of the chuck and out of alinement with the needle, whereby the needle is free and is permitted to abruptly bend at the end of the chuck and out of contact with the guard.

2. The invention according to claim 1, wherein the guard is formed of a plurality of projecting arms arranged respectively at opposite sides of the needle and spread apart at their ends to form an unobstructed space between them through which the needle ex tends.

3. The invention according to claim 1.'

wherein the guard is provided with a tubular body constituting a sleeve which detachably fits over the chuck and with the guard extending to one side of the needle.

4:. The invention according to claim 2, wherein the guard is provided with a socket portion through which the nozzle end of the chuck extends and to which the guard is detachably secured.

5. In a device of the character stated, a hypodermic needle and means for holding it and attaching it to a syringe, combined with a guard held by and extending beyond the means for holding the needle and providing a lateral projecting prong or arm whose end is located. at a distance from the needle, whereby the prong limits the depth of penetration of the needle but leaves the needle free to bend at all places down to its juncture with the means for holding it.

6. The invention according to claim wherein there are provided a plurality of guard prongs or arms, the same arranged on oppositesides of the needle and forming between them a fixed space unobstructed in a direction laterally with respect to the prongs or arms.

7. A guard for a hypodermic syringe, comprising a tubular part constituting a sleeve adapted for fitting upon the needle chuck and having at one end an arm located to one side of its axial line, and projecting in the axial direction.

8. The invention according to claim 7. wherein the arm projects obliquely whereby. the end thereof is at a greater distance from the axial line than where it joints the sleeve.

9. A guard for attachment to a hypodermic syringe for protection of the needle thereof, comprising a tubular body constituting a sleeve open at both ends and haveseeoe ing at one of its ends two diverging arms terminating at a distance from the end of the sleeve and providing a relatively wide space between them, said body having its other end shaped for attachment to the syringe and whereby the needle thereof may extend through the tubular body and between the diverging arms thereof.

10. A hypodermic syringe having a needle chuck and needle projecting heyond the 19 same, and two diverging arms terminating at a distance from the end of the needle chuck and forming a relatively Wide space between them in Which the needle may move in case it' is bent. s

lln testimony of which invention, I here unto set my hand.

i ACUB A. EBERLY JR. 

